Welcome to the forum. I use my iPhone 6 for navigation, because if one part of the radio goes bad goes bad, your SOL with your radio. The Dealers do not fix them; they send them out for repair. Your new radio will not be covered under your warranty because it did not come from the factory. My iPhone 6 has the same size screen as my friends Garmin, and offers the same features. If you are dead set on this, try oemautoparts.com Many of their radios are Dealer take outs, and all are bench tested, and if there are scratches on on the screen, they will replace the screen.